AP Stats Chapter 8 Practice

Quiz
•
Mathematics
•
12th Grade
•
Medium
+3
Standards-aligned
LAUREL SOTO
Used 137+ times
FREE Resource
22 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the acronym we use to help remember the steps for calculating and interpreting a confidence interval?
ALARM
BLIZZARD
PANIC
SNOWDAY
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
2000 children were surveyed and the report that followed said, "With 98% confidence, between 20% and 50% of all parents make their children eat breakfast." What does 98% confidence mean in this situation?
We can be 98% confident that the method used to get the intervals always gives the correct answer
98% of all parents will make their kids eat breakfast
When used repeatedly, the method used to find the interval produces intervals which include the true proportion about 98% of the time
The kids were 98% confident that they ate breakfast that day.
Tags
CCSS.HSS.IC.A.1
CCSS.HSS.IC.B.4
CCSS.HSS.IC.B.6
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Mr. Reinecke wants to estimate the proportion of seniors who will go to college next year with 96% confidence and a margin of error of no more than 5%. What size sample does he need to take?
422
419
410
400
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Mrs. Soto polled 1000 adults and estimated with 90% confidence that the proportion of adults who have dessert after dinner is .75. Ms. Libner thinks that 90% confidence isn't enough and wants to do a 95% confidence. How would a margin of error for 95% compare with a ME for 90% if the same sample size was used?
It would be smaller because a higher confidence means a smaller MOE
It would be larger because a higher confidence means a larger MOE
It would be the same because the sample size is the same
Won't be able to tell without knowing the true parameter
Tags
CCSS.HSS.IC.A.1
CCSS.HSS.IC.B.4
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
You want to calculate a 98% confidence interval for a population mean with a sample of n = 20. What is the appropriate t*?
2.326
2.528
2.539
2.518
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
The heights of 5-year old boys are approximately normal. The mean height of a random sample of 37 5-year old boys is found to be 30 inches with a standard deviation of 3 inches. What is the standard error of x̄?
.493
1.32
5.77
1.96
Tags
CCSS.HSS.IC.A.1
CCSS.HSS.IC.B.4
CCSS.HSS.ID.A.4
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Mrs. Soto wants to find the sample size needed to find with 95% confidence the mean amount of time her stats students spent on homework during the snow days. The population is approximately normal and the known standard deviation is 6 minutes. How large should the sample size be if she wants a margin of error of +- .5 minutes?
553
551
600
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